Management Method and Management System

1. A management system configured to perform management of a computer system including a plurality of node apparatuses, comprising: a storage device; and a control device connected to the storage device, wherein the storage device stores one or more rules indicating a correspondence relationship between one or more conditional events regarding any of the plurality of node apparatuses, and a causal event regarding any of the plurality of node apparatuses to be the cause of one or more conditional events in the case where the conditional events have occurred; and maintenance work information indicating a correspondence relationship between each maintenance work of one or more maintenance works for any of the plurality of node apparatuses and an event regarding a node apparatus to be the target of each maintenance work, which is estimated to occur when the maintenance work is performed, wherein the control device is configured to accept designation of a first maintenance work to be a target of a simulation to be performed and a first node apparatus to be the target of the first maintenance work; identify a first event regarding the first node apparatus estimated to occur when a first maintenance work is performed on the first node apparatus based on the maintenance work information; identify another event to occur when the first event occurs, by performing the simulation based on the rule, and identify the range of effect and phenomenon of the case where the first maintenance work is performed on the first node apparatus, and display the identified range of effect and phenomenon.

2. A management system according to claim 1 , wherein the rule is a meta rule for performing management by associating the conditional event with a kind of a node apparatus related to the conditional event while associating the causal event with a kind of a node apparatus related to the causal event, and the control device is configured to perform analysis of the cause of the event having occurred based on the meta rule when an event regarding any of the plurality of node apparatuses occurs.

3. A management system according to claim 2 , wherein the storage device further stores connection relationship information indicating a connection relationship between the plurality of node apparatuses, and the control device is configured to generate an expansion rule in which the kind of the node apparatus related to conditional event and the kind of the node apparatus related to the causal event are replaced with those of a specific node apparatus, based on the meta rule and the connection relationship information, and perform the simulation based on the expansion rule.

4. A management system according to claim 3 , wherein the control device is configured to store the generated expansion rule in the storage device; and at least one of the one or more expansion rules is used for both simulation and analysis of the cause of the event having occurred.

5. A management system according to claim 1 , wherein the maintenance work information includes, for each maintenance work, data indicating the maintenance work and data indicating the node apparatus to be the target of the maintenance work; the control device is configured to, after accepting designation of the first node apparatus, identify each of one or more maintenance works on the first node apparatus based on the maintenance work information and display data indicating each of the identified maintenance works, and accept designation of the first maintenance work by accepting selection of one piece of data indicating the displayed one or more maintenance works.

6. The management system according to claim 1 , wherein in the maintenance work information, one or more events estimated to occur when an event regarding a node apparatus to be the target of the maintenance work occurs are associated with each maintenance work, and the control device is configured to identify one or more of the first events based on the maintenance work information, and identify the range of effect and phenomenon of the case where the first maintenance work is performed on the first node apparatus, by performing the simulation for each of one or more of the first events.

7. A management system according to claim 1 , wherein data indicating the node apparatus to be the target of the maintenance work in the maintenance work information includes data indicating the kind of the node apparatus, data indicating the model of the node apparatus, and data indicating the vendor of the node apparatus, and different events are associated with the maintenance works on the node apparatuses to be the target of the maintenance works, of different models or vendors.